To celebrate Shark Week, learn about why people are afraid of sharks; how scientists discovered four new species of “walking” sharks (also called epaulette sharks); and how enhanced rock weathering might help us fight climate change with rocks.

Learn about the Luhn algorithm (the genius math behind credit card numbers) and how parents’ brains synchronize when they’re together. Then, play along at home and test your podcast knowledge with this month’s Curiosity Challenge trivia game.

Learn the surprising reason why religious people tend to have more children; why sea turtles are actually pretty clumsy navigators; and where astronomers found the center of our solar system (spoiler alert: it’s not the center of our sun).

Learn about how culture plays a role in feeling sick; that time scientists measured all the light in the known universe; and what Jurassic Park got wrong about the Dilophosaurus, that venomous dinosaur with the frilly collar.

Learn about why you have tiny rocks in your ears; why you may prefer music by artists who have a similar personality to you; and how chemotherapy began as a chemical weapon.

Learn about why some words are more memorable than others; how hair growth works; and how fish end up in landlocked lakes.

Learn about why more advertising means less happiness; how to calculate your maximum heart rate; and how parents and kids can help language researchers during the pandemic, with help from an app called KidTalk.

Stanford behavior scientist Dr. BJ Fogg, author of “Tiny Habits: The Small Changes That Change Everything,” explains why the best new habits are tiny ones. Then, learn why human infants are late bloomers compared to other baby animals.

Stanford behavior scientist Dr. BJ Fogg explains new research into how you can pick new habits you’ll actually stick with. Then, you’ll learn about the best time of day to exercise.

Learn about how scientists and animals are benefitting from the “anthropause” during the coronavirus pandemic; why sweat from stress smells worse than regular sweat; and whether men really “see less mess” than women.